Pigmentation near the T-zone of the new crown antigen test may be invalid test, positive test, related to improper operation, viral infection and other reasons. 1. Invalid test: Mostly considered to be the sampling process there is insufficient sampling volume, sampling specimens are contaminated, incorrect operation methods, or with the new crown antigen test reagent moisture, expired and other reasons. As long as the control position C area is not colored, regardless of whether the T area near the color, may be invalid results. 2. Positive test: When the human body is infected by the new coronavirus, the new crown antigen test will show color near the T-zone, pigmentation, and the control location of the C-zone also shows a red or purple band, indicating that the test results are positive, that is, suggesting that the test may have been infected with the new crown virus. The Neo-Crown antigen test is a rapid test for Neo-Crown virus and usually produces results in 15-20 minutes, but is less accurate than the nucleic acid test. In conclusion, if a person is skeptical about the results of the Neo-Colla Antigen test, he or she should seek medical attention to complete the Neo-Colla virus nucleic acid test and other necessary tests.